<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>

        .container{
            width: 300px;
            height: 300px;
            background-color: skyblue;
        }


    </style>
</head>
<body>
    
        
        <div class="container">
            hello



        </div>
        <div class="othercontainer">

            另外一个框
        </div>

</body>
</html>